二、語法與用法（11~20 題，選出最適當的選項） 
11. Vitamin C, discovered in 1932, ____ first vitamin for which the molecular structure was established.
(A) as the
(B) being the
(C) was the
(D) were the

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統計： A(48), B(68), C(294), D(4), E(0) #1597061

詳解 (共 2 筆)

#2360160
原句若無省略應為: Vitamin C,...
(共 333 字，隱藏中）
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#4852092

這題是考插入句

  1. discovered in 1932為可有可無的插入句，前後的逗號可視為括號，可直接無視
  2. for which子句為形容詞子句，不影響主要句子的結構，也可直接無視

精簡後為：Vitamin C (discovered in 1932) ____ first vitamin for which the molecular structure was established.

很明顯是 S +V +C 的句型，因為時間在過去，維他命C 是藥品名稱不可數，所以選(C)

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